Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8349208 | Modification of copper/iron selectivity in copper solvent extraction systems | Owen Stewart Tinkler, Keith Alan Cramer, John Campbell, Charles J. Maes | 2013-01-08 |
| 8282857 | Modification of copper/iron selectivity in copper solvent extraction systems | Owen Stewart Tinkler, Keith Alan Cramer, John Campbell, Charles J. Maes | 2012-10-09 |
| 5024821 | Solvent extraction process | James N. Greenshields | 1991-06-18 |